I took the gut an stretchet before I put it in the main at 60 lbs. Then I took the poly and reduces the tension 4 lbs. nice comfort and power. dont forget to add two lbs at the last two end to maintain some tension.

I have been using this string set a little over a year for my 11 and 14 year old sons. It is the best string set in the market (even better than full-natural guts). It lasts over a year (2~3 times of play a week) when it was strung VS 50 lb. main and RPM 50 lb. cross. But somehow it l did not last longer than a season ( 10 weeks) when we strung RPM for 53 lb. main and VS for 50 lb. cross for a high school JV player. The protective coating on VS must be optimized for higher tension. My teaching pro coach and stringer recommends VS(natural gut) for main.

My rackets have great balance, weight, and feel but lack built in power (Pro Kennex Ki5 PSEs). This hybrid string set adds the small additional power pop that they lack especially at the low end of the tension range.